sys/dev/disk/ata/ata-disk.c

   1 /*-
   2  * Copyright (c) 1998,1999,2000,2001,2002 Søren Schmidt <sos@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/dev/ata/ata-disk.c,v 1.60.2.24 2003/01/30 07:19:59 sos Exp $
  29  */
  30
  31 #include "opt_ata.h"
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/ata.h>
  35 #include <sys/kernel.h>
  36 #include <sys/malloc.h>
  37 #include <sys/buf.h>
  38 #include <sys/bus.h>
  39 #include <sys/conf.h>
  40 #include <sys/disk.h>
  41 #include <sys/devicestat.h>
  42 #include <sys/cons.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/syslog.h>
  45 #include <sys/rman.h>
  46 #include <sys/proc.h>
  47 #include <sys/buf2.h>
  48 #include <sys/thread2.h>
  49
  50 #include <vm/vm.h>
  51 #include <vm/pmap.h>
  52
  53 #include <machine/md_var.h>
  54 #include <machine/clock.h>
  55
  56 #include "ata-all.h"
  57 #include "ata-disk.h"
  58 #include "ata-raid.h"
  59
  60 /* device structures */
  61 static d_open_t         adopen;
  62 static d_close_t        adclose;
  63 static d_strategy_t     adstrategy;
  64 static d_dump_t         addump;
  65
  66 static struct dev_ops ad_ops = {
  67         { "ad", 0, D_DISK },
  68         .d_open =       adopen,
  69         .d_close =      adclose,
  70         .d_read =       physread,
  71         .d_write =      physwrite,
  72         .d_strategy =   adstrategy,
  73         .d_dump =       addump,
  74 };
  75
  76 /* prototypes */
  77 static void ad_requeue(struct ata_channel *, struct ad_request *);
  78 static void ad_invalidatequeue(struct ad_softc *, struct ad_request *);
  79 static int ad_tagsupported(struct ad_softc *);
  80 static void ad_timeout(struct ad_request *);
  81 static void ad_free(struct ad_request *);
  82 static int ad_version(u_int16_t);
  83
  84 /* misc defines */
  85 #define AD_MAX_RETRIES  3
  86
  87 /* internal vars */
  88 static u_int32_t adp_lun_map = 0;
  89 static int ata_dma = 1;
  90 static int ata_wc = 1;
  91 static int ata_tags = 0;
  92 TUNABLE_INT("hw.ata.ata_dma", &ata_dma);
  93 TUNABLE_INT("hw.ata.wc", &ata_wc);
  94 TUNABLE_INT("hw.ata.tags", &ata_tags);
  95 static MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
  96
  97 /* sysctl vars */
  98 SYSCTL_DECL(_hw_ata);
  99 SYSCTL_INT(_hw_ata, OID_AUTO, ata_dma, CTLFLAG_RD, &ata_dma, 0,
 100            "ATA disk DMA mode control");
 101 SYSCTL_INT(_hw_ata, OID_AUTO, wc, CTLFLAG_RD, &ata_wc, 0,
 102            "ATA disk write caching");
 103 SYSCTL_INT(_hw_ata, OID_AUTO, tags, CTLFLAG_RD, &ata_tags, 0,
 104            "ATA disk tagged queuing support");
 105
 106 void
 107 ad_attach(struct ata_device *atadev, int alreadylocked)
 108 {
 109     struct ad_softc *adp;
 110     struct disk_info info;
 111     cdev_t dev;
 112
 113     adp = kmalloc(sizeof(struct ad_softc), M_AD, M_WAITOK | M_ZERO);
 114
 115     KKASSERT(atadev->channel->req_mpipe.max_count != 0);
 116
 117     adp->device = atadev;
 118 #ifdef ATA_STATIC_ID
 119     adp->lun = (device_get_unit(atadev->channel->dev)<<1)+ATA_DEV(atadev->unit);
 120 #else
 121     adp->lun = ata_get_lun(&adp_lun_map);
 122 #endif
 123     ata_set_name(atadev, "ad", adp->lun);
 124     adp->heads = atadev->param->heads;
 125     adp->sectors = atadev->param->sectors;
 126     adp->total_secs = atadev->param->cylinders * adp->heads * adp->sectors;
 127     bioq_init(&adp->bio_queue);
 128
 129     /* does this device need oldstyle CHS addressing */
 130     if (!ad_version(atadev->param->version_major) ||
 131         !(atadev->param->atavalid & ATA_FLAG_54_58) || !atadev->param->lba_size)
 132         adp->flags |= AD_F_CHS_USED;
 133
 134     /* use the 28bit LBA size if valid */
 135     if (atadev->param->cylinders == 16383 &&
 136         adp->total_secs < atadev->param->lba_size)
 137         adp->total_secs = atadev->param->lba_size;
 138
 139     /* use the 48bit LBA size if valid */
 140     if (atadev->param->support.address48 &&
 141         atadev->param->lba_size48 > 268435455)
 142         adp->total_secs = atadev->param->lba_size48;
 143
 144     if (!alreadylocked)
 145         ATA_SLEEPLOCK_CH(atadev->channel, ATA_CONTROL);
 146     /* use multiple sectors/interrupt if device supports it */
 147     adp->transfersize = DEV_BSIZE;
 148     if (ad_version(atadev->param->version_major)) {
 149         int secsperint = max(1, min(atadev->param->sectors_intr, 16));
 150
 151         if (!ata_command(atadev, ATA_C_SET_MULTI, 0, secsperint,
 152                          0, ATA_WAIT_INTR) && !ata_wait(atadev, 0))
 153         adp->transfersize *= secsperint;
 154     }
 155
 156     /* enable read caching if not default on device */
 157     if (ata_command(atadev, ATA_C_SETFEATURES,
 158                     0, 0, ATA_C_F_ENAB_RCACHE, ATA_WAIT_INTR))
 159         ata_prtdev(atadev, "enabling readahead cache failed\n");
 160
 161     /* enable write caching if allowed and not default on device */
 162     if (ata_wc || (ata_tags && ad_tagsupported(adp))) {
 163         if (ata_command(atadev, ATA_C_SETFEATURES,
 164                         0, 0, ATA_C_F_ENAB_WCACHE, ATA_WAIT_INTR))
 165             ata_prtdev(atadev, "enabling write cache failed\n");
 166     }
 167     else {
 168         if (ata_command(atadev, ATA_C_SETFEATURES,
 169                         0, 0, ATA_C_F_DIS_WCACHE, ATA_WAIT_INTR))
 170             ata_prtdev(atadev, "disabling write cache failed\n");
 171     }
 172
 173     /* use DMA if allowed and if drive/controller supports it */
 174     if (ata_dma)
 175         ata_dmainit(atadev, ata_pmode(atadev->param),
 176                     ata_wmode(atadev->param), ata_umode(atadev->param));
 177     else
 178         ata_dmainit(atadev, ata_pmode(atadev->param), -1, -1);
 179
 180     /* use tagged queueing if allowed and supported */
 181     if (ata_tags && ad_tagsupported(adp)) {
 182         adp->num_tags = atadev->param->queuelen;
 183         adp->flags |= AD_F_TAG_ENABLED;
 184         adp->device->channel->flags |= ATA_QUEUED;
 185         if (ata_command(atadev, ATA_C_SETFEATURES,
 186                         0, 0, ATA_C_F_DIS_RELIRQ, ATA_WAIT_INTR))
 187             ata_prtdev(atadev, "disabling release interrupt failed\n");
 188         if (ata_command(atadev, ATA_C_SETFEATURES,
 189                         0, 0, ATA_C_F_DIS_SRVIRQ, ATA_WAIT_INTR))
 190             ata_prtdev(atadev, "disabling service interrupt failed\n");
 191     }
 192
 193     ATA_UNLOCK_CH(atadev->channel);
 194
 195     devstat_add_entry(&adp->stats, "ad", adp->lun, DEV_BSIZE,
 196                       DEVSTAT_NO_ORDERED_TAGS,
 197                       DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
 198                       DEVSTAT_PRIORITY_DISK);
 199
 200     dev = disk_create(adp->lun, &adp->disk, &ad_ops);
 201     dev->si_drv1 = adp;
 202     dev->si_iosize_max = 256 * DEV_BSIZE;
 203     adp->dev = dev;
 204
 205     /* construct the disk_info */
 206     bzero(&info, sizeof(info));
 207     info.d_media_blksize = DEV_BSIZE;
 208     info.d_media_blocks = adp->total_secs;
 209     info.d_nheads = adp->heads;
 210     info.d_secpertrack = adp->sectors;
 211     info.d_ncylinders = adp->total_secs /
 212                          (info.d_nheads * info.d_secpertrack);
 213     info.d_secpercyl = info.d_secpertrack * info.d_nheads;
 214     disk_setdiskinfo(&adp->disk, &info);
 215
 216     atadev->driver = adp;
 217     atadev->flags = 0;
 218
 219     /* if this disk belongs to an ATA RAID dont print the probe */
 220     if (ata_raiddisk_attach(adp))
 221         adp->flags |= AD_F_RAID_SUBDISK;
 222     else {
 223         if (atadev->driver) {
 224             ad_print(adp);
 225             ata_enclosure_print(atadev);
 226         }
 227     }
 228 }
 229
 230 void
 231 ad_detach(struct ata_device *atadev, int flush) /* get rid of flush XXX SOS */
 232 {
 233     struct ad_softc *adp = atadev->driver;
 234     struct ad_request *request;
 235     struct bio *bio;
 236     struct buf *bp;
 237
 238     atadev->flags |= ATA_D_DETACHING;
 239     ata_prtdev(atadev, "removed from configuration\n");
 240     ad_invalidatequeue(adp, NULL);
 241     TAILQ_FOREACH(request, &atadev->channel->ata_queue, chain) {
 242         if (request->softc != adp)
 243             continue;
 244         TAILQ_REMOVE(&atadev->channel->ata_queue, request, chain);
 245         request->bio->bio_buf->b_error = ENXIO;
 246         request->bio->bio_buf->b_flags |= B_ERROR;
 247         biodone(request->bio);
 248         ad_free(request);
 249     }
 250     ata_dmafree(atadev);
 251     while ((bio = bioq_first(&adp->bio_queue))) {
 252         bioq_remove(&adp->bio_queue, bio);
 253         bp = bio->bio_buf;
 254         bp->b_error = ENXIO;
 255         bp->b_flags |= B_ERROR;
 256         biodone(bio);
 257     }
 258     disk_invalidate(&adp->disk);
 259     devstat_remove_entry(&adp->stats);
 260     disk_destroy(&adp->disk);
 261     if (flush) {
 262         if (ata_command(atadev, ATA_C_FLUSHCACHE, 0, 0, 0, ATA_WAIT_READY))
 263             ata_prtdev(atadev, "flushing cache on detach failed\n");
 264     }
 265     if (adp->flags & AD_F_RAID_SUBDISK)
 266         ata_raiddisk_detach(adp);
 267     ata_free_name(atadev);
 268     ata_free_lun(&adp_lun_map, adp->lun);
 269     atadev->driver = NULL;
 270     atadev->flags = 0;
 271     kfree(adp, M_AD);
 272 }
 273
 274 static int
 275 adopen(struct dev_open_args *ap)
 276 {
 277     struct ad_softc *adp = ap->a_head.a_dev->si_drv1;
 278
 279     if (adp->flags & AD_F_RAID_SUBDISK)
 280         return EBUSY;
 281     return 0;
 282 }
 283
 284 static int
 285 adclose(struct dev_close_args *ap)
 286 {
 287     struct ad_softc *adp = ap->a_head.a_dev->si_drv1;
 288
 289     crit_enter();       /* interlock non-atomic channel lock */
 290     ATA_SLEEPLOCK_CH(adp->device->channel, ATA_CONTROL);
 291     if (ata_command(adp->device, ATA_C_FLUSHCACHE, 0, 0, 0, ATA_WAIT_READY))
 292         ata_prtdev(adp->device, "flushing cache on close failed\n");
 293     ATA_UNLOCK_CH(adp->device->channel);
 294     crit_exit();
 295     return 0;
 296 }
 297
 298 /*
 299  * note: always use the passed device rather then bp->b_dev, as the bp
 300  * may have been translated through several layers.
 301  */
 302 static int
 303 adstrategy(struct dev_strategy_args *ap)
 304 {
 305     cdev_t dev = ap->a_head.a_dev;
 306     struct bio *bio = ap->a_bio;
 307     struct buf *bp = bio->bio_buf;
 308     struct ad_softc *adp = dev->si_drv1;
 309
 310     if (adp->device->flags & ATA_D_DETACHING) {
 311         bp->b_error = ENXIO;
 312         bp->b_flags |= B_ERROR;
 313         biodone(bio);
 314         return(0);
 315     }
 316     bio->bio_driver_info = dev;
 317     crit_enter();
 318     bioqdisksort(&adp->bio_queue, bio);
 319     crit_exit();
 320     ata_start(adp->device->channel);
 321     return(0);
 322 }
 323
 324 int
 325 addump(struct dev_dump_args *ap)
 326 {
 327     cdev_t dev = ap->a_head.a_dev;
 328     struct ad_softc *adp = dev->si_drv1;
 329     struct ad_request request;
 330
 331     if (!adp)
 332         return ENXIO;
 333
 334     /* force PIO mode for dumps */
 335     adp->device->mode = ATA_PIO;
 336     ata_reinit(adp->device->channel);
 337
 338     /* set up request */
 339     bzero(&request, sizeof(struct ad_request));
 340     request.softc = adp;
 341     request.blockaddr = ap->a_offset / DEV_BSIZE;
 342     request.bytecount = ap->a_length;
 343     request.data = ap->a_virtual;
 344     callout_init(&request.callout);
 345     while (request.bytecount > 0) {
 346         ad_transfer(&request);
 347         if (request.flags & ADR_F_ERROR)
 348             return EIO;
 349         request.donecount += request.currentsize;
 350         request.bytecount -= request.currentsize;
 351         DELAY(20);
 352     }
 353
 354     if (ata_wait(adp->device, ATA_S_READY | ATA_S_DSC) < 0)
 355         ata_prtdev(adp->device, "timeout waiting for final ready\n");
 356
 357     return 0;
 358 }
 359
 360 /*
 361  * Critical section is held when this function is called
 362  * by ata_start().
 363  */
 364 void
 365 ad_start(struct ata_device *atadev)
 366 {
 367     struct ad_softc *adp = atadev->driver;
 368     struct bio *bio = bioq_first(&adp->bio_queue);
 369     struct buf *bp;
 370     struct ad_request *request;
 371     int tag = 0;
 372
 373     if (bio == NULL)
 374         return;
 375     bp = bio->bio_buf;
 376
 377     /* if tagged queueing enabled get next free tag */
 378     if (adp->flags & AD_F_TAG_ENABLED) {
 379         while (tag <= adp->num_tags && adp->tags[tag])
 380             tag++;
 381         if (tag > adp->num_tags )
 382             return;
 383     }
 384
 385     /*
 386      * Allocate a request.  The allocation can only fail if the pipeline
 387      * is full, in which case the request will be picked up later when
 388      * ad_start() is called after another request completes.
 389      */
 390     request = mpipe_alloc_nowait(&atadev->channel->req_mpipe);
 391     if (request == NULL) {
 392         ata_prtdev(atadev, "pipeline full allocating request in ad_start\n");
 393         return;
 394     }
 395
 396     KASSERT((bio->bio_offset & DEV_BMASK) == 0,
 397             ("bio_offset not on sector boundary %08llx", bio->bio_offset));
 398
 399     /* setup request */
 400     request->softc = adp;
 401     request->bio = bio;
 402     request->blockaddr = (u_int64_t)(bio->bio_offset >> DEV_BSHIFT);
 403     request->bytecount = bp->b_bcount;
 404     request->data = bp->b_data;
 405     request->tag = tag;
 406     callout_init(&request->callout);
 407     if (bp->b_cmd == BUF_CMD_READ)
 408         request->flags |= ADR_F_READ;
 409     if (adp->device->mode >= ATA_DMA) {
 410         if (ata_dmaalloc(atadev, M_NOWAIT) != 0) {
 411             mpipe_free(&atadev->channel->req_mpipe, request);
 412             ata_prtdev(atadev, "pipeline full allocated dmabuf in ad_start\n");
 413             /* do not revert to PIO, wait for ad_start after I/O completion */
 414             return;
 415         }
 416     }
 417
 418     /* insert in tag array */
 419     adp->tags[tag] = request;
 420
 421     /* remove from drive queue */
 422     bioq_remove(&adp->bio_queue, bio);
 423
 424     /* link onto controller queue */
 425     TAILQ_INSERT_TAIL(&atadev->channel->ata_queue, request, chain);
 426 }
 427
 428 void
 429 ad_requeue(struct ata_channel *chan, struct ad_request *req)
 430 {
 431         if (req->donecount) {
 432                 ata_printf(chan, -1,
 433                         "WARNING: resetting donecount %u for retry\n",
 434                          req->donecount);
 435                 req->bytecount += req->donecount;
 436                 req->donecount = 0;
 437         }
 438         TAILQ_INSERT_HEAD(&chan->ata_queue, req, chain);
 439 }
 440
 441 int
 442 ad_transfer(struct ad_request *request)
 443 {
 444     struct ad_softc *adp;
 445     u_int64_t lba;
 446     u_int32_t count, max_count;
 447     u_int8_t cmd;
 448     int flags = ATA_IMMEDIATE;
 449
 450     /* get request params */
 451     adp = request->softc;
 452
 453     /* calculate transfer details */
 454     lba = request->blockaddr + (request->donecount / DEV_BSIZE);
 455
 456     if (request->donecount == 0) {
 457
 458         /* start timeout for this transfer */
 459         if (dumping) {
 460                 callout_stop(&request->callout);
 461         } else {
 462                 callout_reset(&request->callout, 10 * hz,
 463                                 (void *)ad_timeout, request);
 464         }
 465
 466         /* setup transfer parameters */
 467         count = howmany(request->bytecount, DEV_BSIZE);
 468         max_count = adp->device->param->support.address48 ? 65536 : 256;
 469         if (count > max_count) {
 470             ata_prtdev(adp->device,
 471                        "count %d size transfers not supported\n", count);
 472             count = max_count;
 473         }
 474
 475         if (adp->flags & AD_F_CHS_USED) {
 476             int sector = (lba % adp->sectors) + 1;
 477             int cylinder = lba / (adp->sectors * adp->heads);
 478             int head = (lba % (adp->sectors * adp->heads)) / adp->sectors;
 479
 480             lba = (sector&0xff) | ((cylinder&0xffff)<<8) | ((head&0xf)<<24);
 481             adp->device->flags |= ATA_D_USE_CHS;
 482         }
 483
 484         /* setup first transfer length */
 485         request->currentsize = min(request->bytecount, adp->transfersize);
 486
 487         devstat_start_transaction(&adp->stats);
 488
 489         /* does this drive & transfer work with DMA ? */
 490         request->flags &= ~ADR_F_DMA_USED;
 491         if (adp->device->mode >= ATA_DMA &&
 492             !ata_dmasetup(adp->device, request->data, request->bytecount)) {
 493             request->flags |= ADR_F_DMA_USED;
 494             request->currentsize = request->bytecount;
 495
 496             /* do we have tags enabled ? */
 497             if (adp->flags & AD_F_TAG_ENABLED) {
 498                 cmd = (request->flags & ADR_F_READ) ?
 499                     ATA_C_READ_DMA_QUEUED : ATA_C_WRITE_DMA_QUEUED;
 500
 501                 if (ata_command(adp->device, cmd, lba,
 502                                 request->tag << 3, count, flags)) {
 503                     ata_prtdev(adp->device, "error executing command");
 504                     goto transfer_failed;
 505                 }
 506                 if (ata_wait(adp->device, ATA_S_READY)) {
 507                     ata_prtdev(adp->device, "timeout waiting for READY\n");
 508                     goto transfer_failed;
 509                 }
 510                 adp->outstanding++;
 511
 512                 /* if ATA bus RELEASE check for SERVICE */
 513                 if (adp->flags & AD_F_TAG_ENABLED &&
 514                     ATA_INB(adp->device->channel->r_io, ATA_IREASON) &
 515                     ATA_I_RELEASE)
 516                     return ad_service(adp, 1);
 517             }
 518             else {
 519                 cmd = (request->flags & ADR_F_READ) ?
 520                     ATA_C_READ_DMA : ATA_C_WRITE_DMA;
 521
 522                 if (ata_command(adp->device, cmd, lba, count, 0, flags)) {
 523                     ata_prtdev(adp->device, "error executing command");
 524                     goto transfer_failed;
 525                 }
 526 #if 0
 527                 /*
 528                  * wait for data transfer phase
 529                  *
 530                  * well this should be here acording to specs, but older
 531                  * promise controllers doesn't like it, they lockup!
 532                  */
 533                 if (ata_wait(adp->device, ATA_S_READY | ATA_S_DRQ)) {
 534                     ata_prtdev(adp->device, "timeout waiting for data phase\n");
 535                     goto transfer_failed;
 536                 }
 537 #endif
 538             }
 539
 540             /* start transfer, return and wait for interrupt */
 541             ata_dmastart(adp->device, request->data, request->bytecount,
 542                         request->flags & ADR_F_READ);
 543             return ATA_OP_CONTINUES;
 544         }
 545
 546         /* does this drive support multi sector transfers ? */
 547         if (request->currentsize > DEV_BSIZE)
 548             cmd = request->flags&ADR_F_READ ? ATA_C_READ_MUL : ATA_C_WRITE_MUL;
 549
 550         /* just plain old single sector transfer */
 551         else
 552             cmd = request->flags&ADR_F_READ ? ATA_C_READ : ATA_C_WRITE;
 553
 554         if (ata_command(adp->device, cmd, lba, count, 0, flags)){
 555             ata_prtdev(adp->device, "error executing command");
 556             goto transfer_failed;
 557         }
 558     }
 559
 560     /* calculate this transfer length */
 561     request->currentsize = min(request->bytecount, adp->transfersize);
 562
 563     /* if this is a PIO read operation, return and wait for interrupt */
 564     if (request->flags & ADR_F_READ)
 565         return ATA_OP_CONTINUES;
 566
 567     /* ready to write PIO data ? */
 568     if (ata_wait(adp->device, (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) < 0) {
 569         ata_prtdev(adp->device, "timeout waiting for DRQ");
 570         goto transfer_failed;
 571     }
 572
 573     /* output the data */
 574     if (adp->device->channel->flags & ATA_USE_16BIT)
 575         ATA_OUTSW(adp->device->channel->r_io, ATA_DATA,
 576                   (void *)((uintptr_t)request->data + request->donecount),
 577                   request->currentsize / sizeof(int16_t));
 578     else
 579         ATA_OUTSL(adp->device->channel->r_io, ATA_DATA,
 580                   (void *)((uintptr_t)request->data + request->donecount),
 581                   request->currentsize / sizeof(int32_t));
 582     return ATA_OP_CONTINUES;
 583
 584 transfer_failed:
 585     callout_stop(&request->callout);
 586     ad_invalidatequeue(adp, request);
 587     kprintf(" - resetting\n");
 588
 589     /* if retries still permit, reinject this request */
 590     if (request->retries++ < AD_MAX_RETRIES)
 591         ad_requeue(adp->device->channel, request);
 592     else {
 593         /* retries all used up, return error */
 594         request->bio->bio_buf->b_error = EIO;
 595         request->bio->bio_buf->b_flags |= B_ERROR;
 596         request->bio->bio_buf->b_resid = request->bytecount;
 597         devstat_end_transaction_buf(&adp->stats, request->bio->bio_buf);
 598         biodone(request->bio);
 599         ad_free(request);
 600     }
 601     ata_reinit(adp->device->channel);
 602     return ATA_OP_CONTINUES;
 603 }
 604
 605 int
 606 ad_interrupt(struct ad_request *request)
 607 {
 608     struct ad_softc *adp = request->softc;
 609     int dma_stat = 0;
 610     cdev_t dev;
 611
 612     /* finish DMA transfer */
 613     if (request->flags & ADR_F_DMA_USED)
 614         dma_stat = ata_dmadone(adp->device);
 615
 616     dev = request->bio->bio_driver_info;
 617     /* do we have a corrected soft error ? */
 618     if (adp->device->channel->status & ATA_S_CORR)
 619         diskerr(request->bio, dev,
 620                 "soft error (ECC corrected)", LOG_PRINTF,
 621                 request->donecount);
 622
 623     /* did any real errors happen ? */
 624     if ((adp->device->channel->status & ATA_S_ERROR) ||
 625         (request->flags & ADR_F_DMA_USED && dma_stat & ATA_BMSTAT_ERROR)) {
 626         adp->device->channel->error =
 627             ATA_INB(adp->device->channel->r_io, ATA_ERROR);
 628         diskerr(request->bio, dev,
 629                 (adp->device->channel->error & ATA_E_ICRC) ?
 630                 "UDMA ICRC error" : "hard error", LOG_PRINTF,
 631                 request->donecount);
 632
 633         /* if this is a UDMA CRC error, reinject request */
 634         if (request->flags & ADR_F_DMA_USED &&
 635             adp->device->channel->error & ATA_E_ICRC) {
 636             callout_stop(&request->callout);
 637             ad_invalidatequeue(adp, request);
 638
 639             if (request->retries++ < AD_MAX_RETRIES)
 640                 kprintf(" retrying\n");
 641             else {
 642                 ata_dmainit(adp->device, ata_pmode(adp->device->param), -1, -1);
 643                 kprintf(" falling back to PIO mode\n");
 644             }
 645             ad_requeue(adp->device->channel, request);
 646             return ATA_OP_FINISHED;
 647         }
 648
 649         /* if using DMA, try once again in PIO mode */
 650         if (request->flags & ADR_F_DMA_USED) {
 651             callout_stop(&request->callout);
 652             ad_invalidatequeue(adp, request);
 653             ata_dmainit(adp->device, ata_pmode(adp->device->param), -1, -1);
 654             request->flags |= ADR_F_FORCE_PIO;
 655             kprintf(" trying PIO mode\n");
 656             ad_requeue(adp->device->channel, request);
 657             return ATA_OP_FINISHED;
 658         }
 659
 660         request->flags |= ADR_F_ERROR;
 661         kprintf(" status=%02x error=%02x\n",
 662                adp->device->channel->status, adp->device->channel->error);
 663     }
 664
 665     /* if we arrived here with forced PIO mode, DMA doesn't work right */
 666     if (request->flags & ADR_F_FORCE_PIO && !(request->flags & ADR_F_ERROR))
 667         ata_prtdev(adp->device, "DMA problem fallback to PIO mode\n");
 668
 669     /* if this was a PIO read operation, get the data */
 670     if (!(request->flags & ADR_F_DMA_USED) &&
 671         (request->flags & (ADR_F_READ | ADR_F_ERROR)) == ADR_F_READ) {
 672
 673         /* ready to receive data? */
 674         if ((adp->device->channel->status & ATA_S_READY) == 0)
 675             ata_prtdev(adp->device, "read interrupt arrived early");
 676
 677         if (ata_wait(adp->device, (ATA_S_READY | ATA_S_DSC | ATA_S_DRQ)) != 0) {
 678             ata_prtdev(adp->device, "read error detected (too) late");
 679             request->flags |= ADR_F_ERROR;
 680         }
 681         else {
 682             /* data ready, read in */
 683             if (adp->device->channel->flags & ATA_USE_16BIT)
 684                 ATA_INSW(adp->device->channel->r_io, ATA_DATA,
 685                          (void*)((uintptr_t)request->data + request->donecount),
 686                          request->currentsize / sizeof(int16_t));
 687             else
 688                 ATA_INSL(adp->device->channel->r_io, ATA_DATA,
 689                          (void*)((uintptr_t)request->data + request->donecount),
 690                          request->currentsize / sizeof(int32_t));
 691         }
 692     }
 693
 694     /* finish up transfer */
 695     if (request->flags & ADR_F_ERROR) {
 696         request->bio->bio_buf->b_error = EIO;
 697         request->bio->bio_buf->b_flags |= B_ERROR;
 698     }
 699     else {
 700         request->bytecount -= request->currentsize;
 701         request->donecount += request->currentsize;
 702         if (request->bytecount > 0) {
 703             ad_transfer(request);
 704             return ATA_OP_CONTINUES;
 705         }
 706     }
 707
 708     /* disarm timeout for this transfer */
 709     callout_stop(&request->callout);
 710
 711     request->bio->bio_buf->b_resid = request->bytecount;
 712
 713     devstat_end_transaction_buf(&adp->stats, request->bio->bio_buf);
 714     biodone(request->bio);
 715     ad_free(request);
 716     adp->outstanding--;
 717
 718     /* check for SERVICE (tagged operations only) */
 719     return ad_service(adp, 1);
 720 }
 721
 722 int
 723 ad_service(struct ad_softc *adp, int change)
 724 {
 725     /* do we have to check the other device on this channel ? */
 726     if (adp->device->channel->flags & ATA_QUEUED && change) {
 727         int device = adp->device->unit;
 728
 729         if (adp->device->unit == ATA_MASTER) {
 730             if ((adp->device->channel->devices & ATA_ATA_SLAVE) &&
 731                 (adp->device->channel->device[SLAVE].driver) &&
 732                 ((struct ad_softc *) (adp->device->channel->
 733                  device[SLAVE].driver))->flags & AD_F_TAG_ENABLED)
 734                 device = ATA_SLAVE;
 735         }
 736         else {
 737             if ((adp->device->channel->devices & ATA_ATA_MASTER) &&
 738                 (adp->device->channel->device[MASTER].driver) &&
 739                 ((struct ad_softc *) (adp->device->channel->
 740                  device[MASTER].driver))->flags & AD_F_TAG_ENABLED)
 741                 device = ATA_MASTER;
 742         }
 743         if (device != adp->device->unit &&
 744             ((struct ad_softc *)
 745              (adp->device->channel->
 746               device[ATA_DEV(device)].driver))->outstanding > 0) {
 747             ATA_OUTB(adp->device->channel->r_io, ATA_DRIVE, ATA_D_IBM | device);
 748             adp = adp->device->channel->device[ATA_DEV(device)].driver;
 749             DELAY(10);
 750         }
 751     }
 752     adp->device->channel->status =
 753         ATA_INB(adp->device->channel->r_altio, ATA_ALTSTAT);
 754
 755     /* do we have a SERVICE request from the drive ? */
 756     if (adp->flags & AD_F_TAG_ENABLED &&
 757         adp->outstanding > 0 &&
 758         adp->device->channel->status & ATA_S_SERVICE) {
 759         struct ad_request *request;
 760         int tag;
 761
 762         /* check for error */
 763         if (adp->device->channel->status & ATA_S_ERROR) {
 764             ata_prtdev(adp->device, "Oops! controller says s=0x%02x e=0x%02x\n",
 765                        adp->device->channel->status,
 766                        adp->device->channel->error);
 767             ad_invalidatequeue(adp, NULL);
 768             return ATA_OP_FINISHED;
 769         }
 770
 771         /* issue SERVICE cmd */
 772         if (ata_command(adp->device, ATA_C_SERVICE, 0, 0, 0, ATA_IMMEDIATE)) {
 773             ata_prtdev(adp->device, "problem executing SERVICE cmd\n");
 774             ad_invalidatequeue(adp, NULL);
 775             return ATA_OP_FINISHED;
 776         }
 777
 778         /* setup the transfer environment when ready */
 779         if (ata_wait(adp->device, ATA_S_READY)) {
 780             ata_prtdev(adp->device, "SERVICE timeout tag=%d s=%02x e=%02x\n",
 781                        ATA_INB(adp->device->channel->r_io, ATA_COUNT) >> 3,
 782                        adp->device->channel->status,
 783                        adp->device->channel->error);
 784             ad_invalidatequeue(adp, NULL);
 785             return ATA_OP_FINISHED;
 786         }
 787         tag = ATA_INB(adp->device->channel->r_io, ATA_COUNT) >> 3;
 788         if (!(request = adp->tags[tag])) {
 789             ata_prtdev(adp->device, "no request for tag=%d\n", tag);
 790             ad_invalidatequeue(adp, NULL);
 791             return ATA_OP_FINISHED;
 792         }
 793         ATA_FORCELOCK_CH(adp->device->channel, ATA_ACTIVE_ATA);
 794         adp->device->channel->running = request;
 795         request->serv++;
 796
 797         /* start DMA transfer when ready */
 798         if (ata_wait(adp->device, ATA_S_READY | ATA_S_DRQ)) {
 799             ata_prtdev(adp->device, "timeout starting DMA s=%02x e=%02x\n",
 800                        adp->device->channel->status,
 801                        adp->device->channel->error);
 802             ad_invalidatequeue(adp, NULL);
 803             return ATA_OP_FINISHED;
 804         }
 805         ata_dmastart(adp->device, request->data, request->bytecount,
 806                     request->flags & ADR_F_READ);
 807         return ATA_OP_CONTINUES;
 808     }
 809     return ATA_OP_FINISHED;
 810 }
 811
 812 static void
 813 ad_free(struct ad_request *request)
 814 {
 815     crit_enter();
 816     ata_dmafree(request->softc->device);
 817     request->softc->tags[request->tag] = NULL;
 818     mpipe_free(&request->softc->device->channel->req_mpipe, request);
 819     crit_exit();
 820 }
 821
 822 static void
 823 ad_invalidatequeue(struct ad_softc *adp, struct ad_request *request)
 824 {
 825     /* if tags used invalidate all other tagged transfers */
 826     if (adp->flags & AD_F_TAG_ENABLED) {
 827         struct ad_request *tmpreq;
 828         int tag;
 829
 830         ata_prtdev(adp->device, "invalidating queued requests\n");
 831         for (tag = 0; tag <= adp->num_tags; tag++) {
 832             tmpreq = adp->tags[tag];
 833             adp->tags[tag] = NULL;
 834             if (tmpreq == request || tmpreq == NULL)
 835                 continue;
 836             callout_stop(&request->callout);
 837             ad_requeue(adp->device->channel, tmpreq);
 838         }
 839         if (ata_command(adp->device, ATA_C_NOP,
 840                         0, 0, ATA_C_F_FLUSHQUEUE, ATA_WAIT_READY))
 841             ata_prtdev(adp->device, "flush queue failed\n");
 842         adp->outstanding = 0;
 843     }
 844 }
 845
 846 static int
 847 ad_tagsupported(struct ad_softc *adp)
 848 {
 849     const char *good[] = {"IBM-DPTA", "IBM-DTLA", NULL};
 850     int i = 0;
 851
 852     switch (adp->device->channel->chiptype) {
 853     case 0x4d33105a: /* Promises before TX2 doesn't work with tagged queuing */
 854     case 0x4d38105a:
 855     case 0x0d30105a:
 856     case 0x4d30105a:
 857         return 0;
 858     }
 859
 860     /* check that drive does DMA, has tags enabled, and is one we know works */
 861     if (adp->device->mode >= ATA_DMA && adp->device->param->support.queued &&
 862         adp->device->param->enabled.queued) {
 863         while (good[i] != NULL) {
 864             if (!strncmp(adp->device->param->model, good[i], strlen(good[i])))
 865                 return 1;
 866             i++;
 867         }
 868         /*
 869          * check IBM's new obscure way of naming drives
 870          * we want "IC" (IBM CORP) and "AT" or "AV" (ATA interface)
 871          * but doesn't care about the other info (size, capacity etc)
 872          */
 873         if (!strncmp(adp->device->param->model, "IC", 2) &&
 874             (!strncmp(adp->device->param->model + 8, "AT", 2) ||
 875              !strncmp(adp->device->param->model + 8, "AV", 2)))
 876                 return 1;
 877     }
 878     return 0;
 879 }
 880
 881 static void
 882 ad_timeout(struct ad_request *request)
 883 {
 884     struct ad_softc *adp = request->softc;
 885
 886     adp->device->channel->running = NULL;
 887     ata_prtdev(adp->device, "%s command timeout tag=%d serv=%d - resetting\n",
 888                (request->flags & ADR_F_READ) ? "READ" : "WRITE",
 889                request->tag, request->serv);
 890
 891     if (request->flags & ADR_F_DMA_USED) {
 892         ata_dmadone(adp->device);
 893         ad_invalidatequeue(adp, request);
 894         if (request->retries == AD_MAX_RETRIES) {
 895             ata_dmainit(adp->device, ata_pmode(adp->device->param), -1, -1);
 896             ata_prtdev(adp->device, "trying fallback to PIO mode\n");
 897             request->retries = 0;
 898         }
 899     }
 900
 901     /* if retries still permit, reinject this request */
 902     if (request->retries++ < AD_MAX_RETRIES) {
 903         ad_requeue(adp->device->channel, request);
 904     }
 905     else {
 906         /* retries all used up, return error */
 907         request->bio->bio_buf->b_error = EIO;
 908         request->bio->bio_buf->b_flags |= B_ERROR;
 909         devstat_end_transaction_buf(&adp->stats, request->bio->bio_buf);
 910         biodone(request->bio);
 911         ad_free(request);
 912     }
 913     ata_reinit(adp->device->channel);
 914 }
 915
 916 void
 917 ad_reinit(struct ata_device *atadev)
 918 {
 919     struct ad_softc *adp = atadev->driver;
 920
 921     /* reinit disk parameters */
 922     ad_invalidatequeue(atadev->driver, NULL);
 923     ata_command(atadev, ATA_C_SET_MULTI, 0,
 924                 adp->transfersize / DEV_BSIZE, 0, ATA_WAIT_READY);
 925     if (adp->device->mode >= ATA_DMA)
 926         ata_dmainit(atadev, ata_pmode(adp->device->param),
 927                     ata_wmode(adp->device->param),
 928                     ata_umode(adp->device->param));
 929     else
 930         ata_dmainit(atadev, ata_pmode(adp->device->param), -1, -1);
 931 }
 932
 933 void
 934 ad_print(struct ad_softc *adp)
 935 {
 936     if (bootverbose) {
 937         ata_prtdev(adp->device, "<%.40s/%.8s> ATA-%d disk at ata%d-%s\n",
 938                    adp->device->param->model, adp->device->param->revision,
 939                    ad_version(adp->device->param->version_major),
 940                    device_get_unit(adp->device->channel->dev),
 941                    (adp->device->unit == ATA_MASTER) ? "master" : "slave");
 942
 943         ata_prtdev(adp->device,
 944                    "%lluMB (%llu sectors), %llu C, %u H, %u S, %u B\n",
 945                    (unsigned long long)(adp->total_secs /
 946                    ((1024L*1024L)/DEV_BSIZE)),
 947                    (unsigned long long) adp->total_secs,
 948                    (unsigned long long) (adp->total_secs /
 949                     (adp->heads * adp->sectors)),
 950                    adp->heads, adp->sectors, DEV_BSIZE);
 951
 952         ata_prtdev(adp->device, "%d secs/int, %d depth queue, %s%s\n",
 953                    adp->transfersize / DEV_BSIZE, adp->num_tags + 1,
 954                    (adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
 955                    ata_mode2str(adp->device->mode));
 956
 957         ata_prtdev(adp->device, "piomode=%d dmamode=%d udmamode=%d cblid=%d\n",
 958                    ata_pmode(adp->device->param), ata_wmode(adp->device->param),
 959                    ata_umode(adp->device->param),
 960                    adp->device->param->hwres_cblid);
 961
 962     }
 963     else
 964         ata_prtdev(adp->device,"%lluMB <%.40s> [%lld/%d/%d] at ata%d-%s %s%s\n",
 965                    (unsigned long long)(adp->total_secs /
 966                    ((1024L * 1024L) / DEV_BSIZE)),
 967                    adp->device->param->model,
 968                    (unsigned long long)(adp->total_secs /
 969                     (adp->heads*adp->sectors)),
 970                    adp->heads, adp->sectors,
 971                    device_get_unit(adp->device->channel->dev),
 972                    (adp->device->unit == ATA_MASTER) ? "master" : "slave",
 973                    (adp->flags & AD_F_TAG_ENABLED) ? "tagged " : "",
 974                    ata_mode2str(adp->device->mode));
 975 }
 976
 977 static int
 978 ad_version(u_int16_t version)
 979 {
 980     int bit;
 981
 982     if (version == 0xffff)
 983         return 0;
 984     for (bit = 15; bit >= 0; bit--)
 985         if (version & (1<<bit))
 986             return bit;
 987     return 0;
 988 }